Description:Replacement cap for the expansion and coolant tank.Attributes:• Material: Polypropylene• Outside Diameter: 52.2 mm (2.05 in)• Overflow Connection: Hose barb for 7.4 mm (0.29 in) ID hose• Thread Size: 1.75-16 RH Buttress ThreadApplications:Cat radiator caps are used in the cooling system of Cat engines. Consult your owner's manual or contact your local Cat Dealer for more information.